I've had bad luck with the Sabines, they die after about a year or so. They replaced one that died while still under warranty, but I had to toss another two. I also tried the one that goes inside the guitar, with the LED readout on the upper bout of the guitar, but they went belly-up too. So I just use an old Korg now. No problems, although the headstock thingy sounds intriguing.

Seamus